/*
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 */
package cn.yongw.MouseMove;
/**
 * 实现主机为空异常
 * @author 张永伟
 */
public class HostNullException extends Exception{
    protected String key;    
    /**
     *
     * @param key 异常提示信息
     */
    public HostNullException(String key){
        super(key);
        this.key = key;
    }        
    /**
     * @return 返回异常信息
     */
    public String getKey(){
        return key;
    }
}
